package com.hjy.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 *  自定义缓存读写机制
 */
@Configuration
@EnableCaching  //开启缓存
public class RedisConfig extends CachingConfigurerSupport {

    /**
     * 序列化
     * @param factory
     * @return
     */
    @Bean
    public RedisTemplate<String ,Object> redisTemplate(@Autowired RedisConnectionFactory factory){
        RedisTemplate<String,Object> template = new RedisTemplate<>();

        template.setConnectionFactory(factory);

        //创建一个String序列化器
        RedisSerializer<String> stringRedisSerializer = new StringRedisSerializer();
        //创建一个Json序列化器
        //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值（默认使用JDK的序列化方式）
        Jackson2JsonRedisSerializer<Object> jsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);


        ObjectMapper objectMapper = new ObjectMapper();
        // 指定要序列化的域，field,get和set,以及修饰符范围，ANY是都有包括private和public
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 指定序列化输入的类型，类必须是非final修饰的。final修饰的类，比如String,Integer等会跑出异常
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        jsonRedisSerializer.setObjectMapper(objectMapper);


        template.setKeySerializer(stringRedisSerializer);
        template.setValueSerializer(jsonRedisSerializer);

        template.setHashValueSerializer(stringRedisSerializer);
        template.setHashValueSerializer(jsonRedisSerializer);

        template.afterPropertiesSet();

        return template;
    }

    /**
     * 采用 RedisCacheManager 作为缓存管理器
     * @param redisTemplate
     * @return
     */
    @Bean
    public RedisCacheManager redisCacheManager(RedisTemplate redisTemplate) {
        RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisTemplate.getConnectionFactory());
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(redisTemplate.getValueSerializer()));
        return new RedisCacheManager(redisCacheWriter, redisCacheConfiguration);
    }
}

